/jEdit/tags/jedit-4-5-pre1/org/gjt/sp/jedit/indent/BracketIndentRule.java
Java | 168 lines | 119 code | 16 blank | 33 comment | 14 complexity | 8273c1dfed1b0b7e9771a9c073be3cd4 MD5 | raw file
Possible License(s): BSD-3-Clause, AGPL-1.0, Apache-2.0, LGPL-2.0, LGPL-3.0, GPL-2.0, CC-BY-SA-3.0, LGPL-2.1, GPL-3.0, MPL-2.0-no-copyleft-exception, IPL-1.0
- /*
- * BracketIndentRule.java
- * :tabSize=8:indentSize=8:noTabs=false:
- * :folding=explicit:collapseFolds=1:
- *
- * Copyright (C) 2005 Slava Pestov
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
- package org.gjt.sp.jedit.indent;
- import javax.swing.text.Segment;
- import org.gjt.sp.jedit.buffer.JEditBuffer;
- import org.gjt.sp.jedit.syntax.Token;
- import org.gjt.sp.jedit.syntax.TokenHandler;
- import org.gjt.sp.jedit.syntax.TokenMarker;
- /**
- * @author Slava Pestov
- * @version $Id: BracketIndentRule.java 18919 2010-11-04 10:52:55Z kpouer $
- */
- public abstract class BracketIndentRule implements IndentRule
- {
- //{{{ BracketIndentRule constructor
- public BracketIndentRule(char openBracket, char closeBracket)
- {
- this.openBracket = openBracket;
- this.closeBracket = closeBracket;
- } //}}}
- //{{{ Brackets class
- public static class Brackets
- {
- int openCount;
- int closeCount;
- } //}}}
- //{{{ getBrackets() method
- public Brackets getBrackets(JEditBuffer buffer, int lineIndex)
- {
- return getBrackets(buffer, lineIndex,
- 0, buffer.getLineLength(lineIndex));
- } //}}}
- //{{{ getBrackets() method
- public Brackets getBrackets(JEditBuffer buffer, int lineIndex,
- int begin, int end)
- {
- LineScanner scanner = new LineScanner(begin, end);
- buffer.markTokens(lineIndex, scanner);
- return scanner.result;
- } //}}}
- //{{{ toString() method
- public String toString()
- {
- return getClass().getName() + "[" + openBracket + ","
- + closeBracket + "]";
- } //}}}
- protected char openBracket, closeBracket;
- //{{{ class LineScanner
- private class LineScanner implements TokenHandler
- {
- public final Brackets result;
- private int scannedIndex;
- private final int beginIndex;
- private final int endIndex;
- public LineScanner(int begin, int end)
- {
- this.result = new Brackets();
- this.scannedIndex = 0;
- this.beginIndex = begin;
- this.endIndex = end;
- }
- boolean rejectsToken(byte id)
- {
- // Rejects comments and literals.
- // Accepts all others.
- switch (id)
- {
- case Token.COMMENT1:
- case Token.COMMENT2:
- case Token.COMMENT3:
- case Token.COMMENT4:
- case Token.LITERAL1:
- case Token.LITERAL2:
- case Token.LITERAL3:
- case Token.LITERAL4:
- return true;
- default:
- return false;
- }
- }
- private void scan(Segment seg, int offset, int length)
- {
- int index = scannedIndex;
- if (index >= endIndex)
- {
- return;
- }
- if (index < beginIndex)
- {
- int numToSkip = beginIndex - index;
- if (numToSkip >= length)
- {
- return;
- }
- offset += numToSkip;
- length -= numToSkip;
- index = beginIndex;
- }
- if (index + length > endIndex)
- {
- length = endIndex - index;
- }
- for (int i = 0; i < length; ++i)
- {
- char c = seg.array[seg.offset + offset + i];
- if(c == openBracket)
- {
- result.openCount++;
- }
- else if(c == closeBracket)
- {
- if(result.openCount != 0)
- result.openCount--;
- else
- result.closeCount++;
- }
- }
- }
- public void handleToken(Segment seg
- , byte id, int offset, int length
- , TokenMarker.LineContext context)
- {
- if (!rejectsToken(id))
- {
- scan(seg, offset, length);
- }
- scannedIndex += length;
- }
- public void setLineContext(TokenMarker.LineContext lineContext)
- {
- }
- } //}}}
- }